Sonic the Hedgehog | Chaos Emeralds

Chaos Emeralds adds the seven Chaos Emeralds to Minecraft, each hidden in a chest in a different structure across the Overworld, Nether and End, such as villages, desert temples, nether fortresses and end cities. Each one grants its own power:

• Power: Strength V, six times the damage, and 60% less damage taken.
• Dexterity: Speed, Jump Boost, Haste and Night Vision.
• Healing: an instant heal and fast regeneration.
• Invincibility: immunity to all damage.
• Immortality: slow healing over a long time.
• Invisibility: a long stretch of invisibility.
• Flight: creative-style flying.

Carry all seven and sneak while using one to transform into Super Form. Use the Warp Topaz to save a spot and warp back to it later.

Floating Sky Islands hold the Master Emerald on their central altar. Standing close heals you and shines a green beam into the sky. Stand on it and sneak for 90 seconds of Master Form, with flight, a tenth of normal damage and sixteen times the hit strength.

The mod also adds a power system. A Chaos Energy Extractor with Stabilizers turns emeralds into energy, and you move that energy through cables, a Chaos Battery, a Robotnik Generator and a Robotnik Smelter. At the end of the chain is the Orbital Laser. Pick a target on its map, choose a blast radius from 50 to 1,500 blocks, and about 20 seconds later a beam from the sky wipes out everything in the blast, almost down to bedrock. Back up your world before firing it.